# Error while using SurfaceLIC

**URL:** https://discourse.paraview.org/t/error-while-using-surfacelic/931
**Category:** ParaView Support
**Created:** [November 19, 2018, 1:45pm UTC](https://discourse.paraview.org/t/error-while-using-surfacelic/931 "2018-11-19T13:45:54Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![Saketh\_Bharadwaj](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/s/ed8c4c/32.png) [@Saketh\_Bharadwaj](https://discourse.paraview.org/u/Saketh_Bharadwaj)
#### Post date: [November 19, 2018, 1:45pm UTC](https://discourse.paraview.org/t/error-while-using-surfacelic/931/1 "2018-11-19T13:45:54Z")

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I am seeing the an error whenever I use surface LIC. I am using paraview 5.4.1.

Initially,  
When I load my case file and click “Apply”, I see an error message

```
[ERROR: In :\bbd\2d618e80\build\superbuild\paraview\src\VTK\IO\EnSight\vtkEnSightGoldBinaryReader.cxx, line 2267
vtkEnSightGoldBinaryReader (0000023852A76A20): Unknown element type "coordinates "]. 

```

In the selection dropdown list I am seeing velocity as "velocity(“partial”). But everything after this looks as expected.  
Later when I load surfaceLIC, I see the message [paraview error.txt](https://discourse.paraview.org/uploads/default/original/1X/298a8b2419dab14df6297cdaadff2b3da6bc0261.txt) (5.4 KB).  
in short, it shows a failing shader and then :

```
 ERROR: In C:\bbd\2d618e80\build\superbuild\paraview\src\VTK\Rendering\OpenGL2\vtkShaderProgram.cxx, line 424
 vtkShaderProgram (00000238B4095460): ERROR: 0:151: 'normalVCVSOutput' : undeclared identifier
 ERROR: 0:151: '=' : cannot convert from 'highp float' to '3-component vector of highp float' 

```

How can I fix this error?

---

<div class="post-metadata">

### Author: ![utkarsh.ayachit](https://discourse.paraview.org/user_avatar/discourse.paraview.org/utkarsh.ayachit/32/39_2.png) [@utkarsh.ayachit](https://discourse.paraview.org/u/utkarsh.ayachit)
#### Post date: [November 19, 2018, 9:21pm UTC](https://discourse.paraview.org/t/error-while-using-surfacelic/931/2 "2018-11-19T21:21:45Z")

</div>

Let’s try to isolate the issue.

First, try loading the `disk_out_ref.ex2` dataset from the ParaView example datasets, load all arrays and then try to show the surface lic. Does that work?